# Progress M-SO1

> modified Progress spacecraft used to deliver the Pirs module to the ISS

**Wikidata**: [Q2599542](https://www.wikidata.org/wiki/Q2599542)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Progress_DC-1)  
**Source**: https://4ort.xyz/entity/progress-m-so1

## Summary
Progress M-SO1 was a modified Progress spacecraft specifically designed to deliver the Pirs docking module to the International Space Station (ISS). Launched in 2001, it was a critical mission for expanding the ISS's docking capabilities and supporting future crewed and cargo missions.

## Key Facts
- **Purpose**: Modified Progress spacecraft used to deliver the Pirs module to the ISS.
- **Launch Date**: September 14, 2001, at 23:34:55 UTC.
- **Mass**: 6,900 kg at launch.
- **Operator**: Roscosmos State Corporation.
- **Manufacturer**: S.P. Korolev Rocket and Space Corporation Energia.
- **Launch Vehicle**: Soyuz-U rocket.
- **Docking**: Docked with the ISS's Zvezda module on September 17, 2001.
- **Undocking**: Undocked from the Pirs module on September 26, 2001.
- **Orbit Decay**: Re-entered Earth's atmosphere on September 26, 2001.
- **Significant Event**: Delivered the Pirs module, which served as a docking compartment and airlock for the ISS.

## FAQs
### Q: What was the primary mission of Progress M-SO1?
A: The primary mission of Progress M-SO1 was to deliver the Pirs docking module to the International Space Station (ISS). This module expanded the ISS's docking capabilities and served as an airlock for spacewalks.

### Q: When was Progress M-SO1 launched and what rocket was used?
A: Progress M-SO1 was launched on September 14, 2001, using a Soyuz-U rocket from Gagarin's Start launch site.

### Q: What happened to Progress M-SO1 after its mission?
A: After delivering the Pirs module, Progress M-SO1 undocked from the ISS on September 26, 2001, and re-entered Earth's atmosphere later that day, burning up upon re-entry.

### Q: Who operated Progress M-SO1?
A: Progress M-SO1 was operated by the Roscosmos State Corporation, the Russian space agency.

### Q: What was the mass of Progress M-SO1 at launch?
A: The mass of Progress M-SO1 at launch was 6,900 kg.

## Why It Matters
Progress M-SO1 played a crucial role in the expansion and functionality of the International Space Station. By delivering the Pirs module, it enabled additional docking ports for Soyuz and Progress spacecraft, facilitating more frequent crew rotations and cargo resupply missions. The Pirs module also served as an airlock for spacewalks, enhancing the ISS's operational capabilities. This mission underscored the importance of international cooperation in space exploration and the continuous effort to maintain and upgrade the ISS for scientific research and human spaceflight.

## Notable For
- **First Delivery of Pirs Module**: Progress M-SO1 was the first spacecraft to deliver the Pirs docking module to the ISS.
- **Critical Expansion of ISS**: The Pirs module provided additional docking ports and an airlock, significantly enhancing the ISS's capabilities.
- **Short Mission Duration**: The mission was completed in a relatively short timeframe, with the spacecraft re-entering Earth's atmosphere just 12 days after launch.
- **International Cooperation**: The mission highlighted the collaborative efforts between Russia and other international partners in maintaining and expanding the ISS.

## Body
### Overview
Progress M-SO1 was a modified version of the Progress-M spacecraft, specifically designed to deliver the Pirs module to the International Space Station. This mission was part of the Russian space program and was operated by Roscosmos.

### Launch and Docking
- **Launch Date and Time**: September 14, 2001, at 23:34:55 UTC.
- **Launch Site**: Gagarin's Start.
- **Launch Vehicle**: Soyuz-U rocket.
- **Docking Date and Time**: September 17, 2001, at 01:05 UTC.
- **Docking Location**: Zvezda module of the ISS.

### Mission Details
- **Primary Payload**: Pirs docking module.
- **Mass at Launch**: 6,900 kg.
- **Manufacturer**: S.P. Korolev Rocket and Space Corporation Energia.
- **Operator**: Roscosmos State Corporation.

### Undocking and Re-entry
- **Undocking Date and Time**: September 26, 2001, at 15:36 UTC.
- **Undocking Location**: Pirs module of the ISS.
- **Re-entry Date and Time**: September 26, 2001, at approximately 23:30 UTC.

### Significance
The delivery of the Pirs module by Progress M-SO1 was a significant milestone in the construction and operation of the ISS. The Pirs module provided additional docking ports for Soyuz and Progress spacecraft, enabling more frequent crew rotations and cargo resupply missions. It also served as an airlock for spacewalks, enhancing the ISS's operational capabilities.

## Schema Markup
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{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "Progress M-SO1",
  "description": "Modified Progress spacecraft used to deliver the Pirs module to the ISS.",
  "url": "https://en.wikipedia.org/wiki/Progress_DC-1",
  "sameAs": ["https://www.wikidata.org/wiki/Q206855", "https://en.wikipedia.org/wiki/Progress_DC-1"],
  "additionalType": "Spacecraft"
}

## References

1. [Source](https://space.skyrocket.de/doc_sdat/dc-1.htm)
2. Jonathan's Space Report
3. [Source](http://www.astronautix.com/p/progressm-so.html)
4. Freebase Data Dumps. 2013
5. [Source](https://www.nasaspaceflight.com/2021/07/farewell-pirs/)